Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5496879 | Printing ink | Karl A. Kocherscheid, Klaus Stammen | 1996-03-05 |
| 5282894 | Use of a liquid containing IR dyes as printing ink | Bernhard Albert, Friedrich Closs, Juergen Kipper, Walter Kurtz, Karin H. Beck | 1994-02-01 |